chalaza
Americannoun
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Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
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Botany. the point of an ovule or seed where the integuments are united to the nucellus.
noun
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one of a pair of spiral threads of albumen holding the yolk of a bird's egg in position
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the basal part of a plant ovule, where the integuments and nucellus are joined
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One of two spiral bands of tissue in an egg that connect the yolk to the lining membrane at either end of the shell.
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The region of a plant ovule that is opposite the micropyle, where the integuments and nucellus are joined.
Other Word Forms
Derived Forms
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Nouns
Etymology
Origin of chalaza
1695–1705; < New Latin < Greek: hail, lump
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
The radicular extremity points towards the micropyle, while the cotyledonary extremity is pointed towards the base of the ovule or the chalaza.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various
Rhaphe, the line or ridge which runs from the hilum to the chalaza in anatropous and amphitropous seeds.
From The Elements of Botany For Beginners and For Schools by Gray, Asa
Seeds medium in size, broad, beak short; chalaza oval or roundish, elevated, very distinct; raphe a distinct, cord-like ridge.
From Manual of American Grape-Growing by Hedrick, U. P.
Orthotropous ovule of Buckwheat: c, hilum and chalaza; f, orifice.
From The Elements of Botany For Beginners and For Schools by Gray, Asa
Amphitropous ovule of Mallow: f, orifice; h, hilum; r, rhaphe; c, chalaza.
From The Elements of Botany For Beginners and For Schools by Gray, Asa
A pair of fibrous strands called chalazae anchor the yolk inside the egg, and Geary figured that sundering them would allow the yolk to float to the center.
From New York Times ● Oct. 14, 2012
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
